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101-1691 — NUT,PLAIN,HEXAGON

✓ Government record, cited
3M · ORING SEAL
PRODUCT OVERVIEW

101-1691: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a 3M industrial component. Key specifications include nut_style: HEXAGON, nut_height: 0.688 INCHES NOMINAL IN, thread_class: 3B, thread_series: UN, nominal_thread_size: 2.250 INCHES IN, end_item_identification: VALVE, BALL 2. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-042-2491, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
101-1691
NSN: 5340-01-042-2491
NIINs: 010422491, 015139152
FSC: 5340 — Hardware, Commercial
CAGE: 30528 — HOLLINGSEAD INTERNATIONAL, LLC (USA)
SPECIFICATIONS
nut_styleHEXAGON
nut_height0.688 INCHES NOMINAL IN
thread_class3B
thread_seriesUN
nominal_thread_size2.250 INCHES IN
end_item_identificationVALVE, BALL 2
thread_quantity_per_inch16
NSN5340-01-042-2491
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 101-1691 MFR: 3M ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD LENGTH: 0.227 INCHES NOMINAL IN
•
SHAPE: ROUND
•
NOMINAL THREAD SIZE: 0.4375 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
THREAD SERIES DESIGNATOR: UNF
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.227 INCHES NOMINAL IN
SHAPEROUND
OVERALL LENGTH2.140 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.4375 INCHES IN
SPECIAL FEATURESSPRING DOADED GUIDE PIN FOR USE AS A REAR HOLD-DOWN FOR ARINC CASES
PART NAME ASSIGNED BY CONTROLLING AGENCYGUIDE PIN,SPRING LOADED
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNF
END PRESSURE RATING7.240 POUNDS NOMINAL LBS
SUBSTITUTES & CROSS-REFERENCES 3
015-3536-010Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
17576Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
101169-1GReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 101-1691?
101-1691 is a NUT,PLAIN,HEXAGON manufactured by 3M.
What parts can replace 101-1691?
There are 3 known substitutes for 101-1691: 015-3536-010, 17576, 101169-1G. Substitute compatibility should be verified for your specific system.
What is the NSN for 101-1691?
101-1691 is cataloged in the U.S. Government catalog under NSN 5340-01-042-2491. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.