PartsTable
Technical Data Sheet
Download PDF

2921256 — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2921256: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE, special_features: 1.00 IN. SQUARE SHAPE BY 0.250NIN.

THK IN, material_hardness_rating: 20.0 SHORE DUROMETER A MINIMUM AND 30.0 SHORE DUROMETER A MAXIMUM, material_document_and_classification: ZZ-R-765, CLASS 3B, GRADE 25 FED SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S. Government catalog under NSN 5340-01-059-1776, 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
2921256
NSN: 5340-01-059-1776
FSC: 5340 — Hardware, Commercial
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialRUBBER SILICONE
special_features1.00 IN. SQUARE SHAPE BY 0.250NIN. THK IN
material_hardness_rating20.0 SHORE DUROMETER A MINIMUM AND 30.0 SHORE DUROMETER A MAXIMUM
material_document_and_classificationZZ-R-765, CLASS 3B, GRADE 25 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-059-1776
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2921256 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
•
MATERIAL HARDNESS RATING: 20.0 SHORE DUROMETER A MINIMUM AND 30.0 SHORE DUROMETER A MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: ZZ-R-765, CLASS 3B, GRADE 25 FED SPEC SINGLE MATERIAL RESPONSE
•
COLOR: NATURAL
•
MATERIAL: RUBBER SILICONE
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING20.0 SHORE DUROMETER A MINIMUM AND 30.0 SHORE DUROMETER A MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-R-765, CLASS 3B, GRADE 25 FED SPEC SINGLE MATERIAL RESPONSE
COLORNATURAL
SPECIAL FEATURES1.00 IN. SQUARE SHAPE BY 0.250NIN. THK IN
MATERIALRUBBER SILICONE
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
344269Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
Ready to buy 2921256?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 2921256?
2921256 is a BUMPER.
What parts can replace 2921256?
There is 1 known substitute for 2921256: 344269. Substitute compatibility should be verified for your specific system.
What is the NSN for 2921256?
2921256 is cataloged in the U.S. Government catalog under NSN 5340-01-059-1776. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 2921256