PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B-91Tensiometer

Loos & Co Inc · NSN 6635-01-391-1806 · FSC 6635 · No Item Name Available
Verified by PartsTable
NSN 6635-01-391-1806 — this item is cataloged by the U.S. Government under National Stock Number 6635-01-391-1806. Primary manufacturer part number: B-91.
Features
  • Tensiometer — FSC 6635
  • Scale Range: +80.0 TO 950.0 POUNDS LBS
  • Material Accommodated Diameter: 0.09375 INCHES MINIMUM AND 0.15625 INCHES MAXIMUM IN
  • Scale Quantity: 1
  • Scale Name: LB SCALE
  • 1 verified cross-reference
  • Primary manufacturer: Loos & Co Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tensiometer, cataloged under National Stock Number 6635-01-391-1806, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Loos & Co Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6635-01-391-1806
Primary Part NumberB-91
Item NameTensiometer
FSC / FSG6635 / 66 — No Item Name Available
ManufacturerLoos & Co Inc
StatusACTIVE
Scale Range+80.0 TO 950.0 POUNDS LBS
Material Accommodated Diameter0.09375 INCHES MINIMUM AND 0.15625 INCHES MAXIMUM IN
Scale Quantity1
Scale NameLB SCALE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3030-00-160-8305B91 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
5945-00-374-1691B91.0 INTERCHANGEABLE
Relay,thermal
Schneider Electric Usa, Inc.
6645-00-487-4978B91 INTERCHANGEABLE
Wheel-Sweep
Power Control Devices Inc
Cross-Reference Index
Part NumberManufacturer
B-91 PRIMARY Loos & Co Inc (USA)
Related Parts
3030-00-160-8305INTERCHANGEABLE
BELT,V
B91
5945-00-374-1691INTERCHANGEABLE
RELAY,THERMAL
B91.0
6645-00-487-4978INTERCHANGEABLE
WHEEL-SWEEP
B91

Frequently Asked Questions

What is NSN 6635-01-391-1806?

NSN 6635-01-391-1806 is a Tensiometer, manufactured by Loos & Co Inc, classified under FSC 6635 (No Item Name Available). Status: active.

What are the part numbers for NSN 6635-01-391-1806?

NSN 6635-01-391-1806 has 1 cross-referenced part number: B-91 (Loos & Co Inc).

What NSN replaces 6635-01-391-1806?

There are 3 known substitutes for 6635-01-391-1806: 3030-00-160-8305, 5945-00-374-1691, 6645-00-487-4978. Verify interchangeability with system specifications before substitution.

What are the specifications of B-91?

Key specifications for B-91: Scale Range: +80.0 TO 950.0 POUNDS LBS; Special Features: MADE OF ANODIZED ALUMINUM; MEASURES GUY WIRE FOR UNMANNED THREAT EMITTER UMTE; Material Accommodated Diameter: 0.09375 INCHES MINIMUM AND 0.15625 INCHES MAXIMUM IN; Scale Quantity: 1. 5 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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