Pacific Scientific T5-2002-301-00 Cable Tensiometer

The Pacific Scientific T5-2002-301-00 is the dual-calibration British/CWT model in the T5-2002 sub-series — the only T5-2002 instrument calibrated for British-specification CWT (hundredweight) cable sizes, while also cross-reading on the equivalent standard inch diameters. It covers 3, 5, 10, 15, 25, 35, and 45 CWT cables across three tension ranges (10–100 lbs, 15–150 lbs, and 25–150 lbs), and simultaneously reads on 1/16" through 1/4" standard inch cables — making it the single instrument that serves both British-spec and American-spec aircraft control systems. Listed under NSN 6635-00-293-0400 and carrying the U.S.A.F. C5 designation, it is the standard choice for operators maintaining British-origin and Commonwealth aircraft under military contracts, multinational MRO programs, and international aviation maintenance agreements.

One Instrument for Two Cable Standards

British-specification aircraft use CWT (hundredweight) cable sizing rather than the inch-fraction diameters common in American-standard aircraft. For maintenance programs that service both, carrying separate tensiometers for each standard is an avoidable overhead. The T5-2002-301-00 eliminates that duplication. Two calibration cards ship with every unit: T594-101 for standard inch cable readings and T594-301B for CWT cable readings. The technician selects the appropriate card for the aircraft being serviced and reads tension directly from the dial — no conversion tables, no secondary instruments, no additional steps. The tension ranges — 10–100 lbs on 3/5/10 CWT and 1/16"/3/32"/1/8" cables; 15–150 lbs on 15/25 CWT and 5/32"/3/16" cables; and 25–150 lbs on 35/45 CWT and 7/32"/1/4" cables — mirror the T5-2002-101-00's coverage, making the -301-00 functionally equivalent on American-spec aircraft while adding full CWT coverage for British-spec platforms. Like every T5 series instrument, it operates with zero temperature error and requires no preliminary adjustments — accurate from a cold hangar to a hot flight line without any setup.

Built for Multinational Maintenance Programs

• Dual-calibration — reads British CWT cable sizes and standard inch cable sizes on the same instrument
• CWT cable coverage — 3, 5, 10, 15, 25, 35, and 45 CWT
• Standard inch cross-read — 1/16", 3/32", 1/8", 5/32", 3/16", 7/32", and 1/4"
• Two calibration cards included — T594-101 (inch) and T594-301B (CWT); select the correct card for the aircraft specification
• NSN 6635-00-293-0400 — procurable through government and military supply channels
• U.S.A.F. C5 designation — qualified for military aviation maintenance programs
• Zero temperature error — calibration-stable from extreme cold to high heat
• Pointer lock brake lever — retains reading before removal in confined or low-visibility areas
• One-handed operation — complete a cable tension check in seconds
• Complete kit — risers #1, #2C, #3; both calibration cards; calibration certificate; foam-lined zippered hard case

Technical Specifications

• Tension Range (Low): 10 – 100 lbs
• Tension Range (Mid): 15 – 150 lbs
• Tension Range (High): 25 – 150 lbs
• CWT Cable Sizes (Low Range): 3, 5, 10 CWT
• CWT Cable Sizes (Mid Range): 15, 25 CWT
• CWT Cable Sizes (High Range): 35, 45 CWT
• Standard Inch Cross-Read (Low): 1/16", 3/32", 1/8"
• Standard Inch Cross-Read (Mid): 5/32", 3/16"
• Standard Inch Cross-Read (High): 7/32", 1/4"
• Calibration Type: Dual — CWT British & Standard Inch
• Calibration Cards: T594-101 (standard inch) & T594-301B (CWT); both included
• Indicator: Black dial indicating
• NSN: 6635-00-293-0400
• USAF Designation: C5
• Temperature Stability: Zero temperature error; operates from -53°C to 71°C
• Pointer Lock: Yes — brake lever rod
• Risers Included: #1, #2C, #3
• Case: Foam-lined zippered hard case
• Origin: Made in the USA
• Warranty: 1 year on new units

Typical Applications

• Maintenance on British-origin and Commonwealth aircraft with CWT-specification control cables
• RAF, British military, and international defense aviation maintenance programs
• Multinational MRO facilities servicing both British-spec and American-spec aircraft fleets
• Government and military procurement under NSN 6635-00-293-0400
• Any program requiring a single tensiometer for both CWT and standard inch cable systems
• Post-repair and return-to-service cable tension verification on British-specification aircraft

Pacific Scientific T5-2002-301-00 Calibration

The T5-2002-301-00 should be recalibrated on a scheduled basis — annually at minimum, and immediately following any overload event, mechanical shock, or drop. As a dual-calibration instrument used on primary flight control cables across both British CWT and American standard specifications, maintaining the accuracy of both calibration profiles is essential to airworthiness compliance. Pilot John International operates an ISO 17025-accredited calibration laboratory capable of recalibrating Pacific Scientific T5 series tensiometers to original manufacturer specifications, issuing a fully traceable calibration certificate upon completion. Whether your maintenance program operates under FAA oversight, UK CAA requirements, a DOD contract, or an ISO 9001 quality management system, PJi's lab delivers the traceability and documentation your compliance requirements demand. Learn more about PJi's ISO 17025 Calibration Services →