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161979 — NUT,PLAIN,ROUND

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

161979: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, nut_style: ROUND, nut_diameter: 0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, thread_series: UNEF. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-797-2502, 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
161979
NSN: 5331-00-797-2502
NIINs: 007972502, 008008718, 008191473
FSC: 5331 — O-ring
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
nut_styleROUND
nut_diameter0.870 INCHES MINIMUM AND 0.890 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
thread_seriesUNEF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter2.358 INCHES MINIMUM AND 2.404 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle87.5 DEGREES MINIMUM AND 92.5 DEGREES MAXIMUM NUT
drive_point_depth0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN
drive_point_width0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
NSN5331-00-797-2502
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 161979 MFR: OEM ⚠ 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
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 2.381 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 2.165 INCHES MINIMUM AND 2.185 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.381 INCHES NOMINAL IN
CENTER HOLE DIAMETER2.165 INCHES MINIMUM AND 2.185 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 9
810-2177934-711 -5Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
8451889584-10-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ARP568-139MILP5 516CLBReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
70734589Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
ARP568-139Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
803-1385721-7 PReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 161979?
161979 is a NUT,PLAIN,ROUND.
What parts can replace 161979?
There are 9 known substitutes for 161979: 810-2177934-711 -5, 8451889584-10-1, ARP568-139MILP5 516CLB and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 161979?
161979 is cataloged in the U.S. Government catalog under NSN 5331-00-797-2502. 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.