PartsTable
Technical Data Sheet
MS21251-B3S ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The TURNBUCKLE BODY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 482 OVERALL, body_style: ROUND BODY W/LOCKING DEVICE, body_length: 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN, thread_class: 3B BODY, thread_length: 2.250 INCHES NOMINAL OVERALL IN, thread_direction: RIGHT-HAND OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-067-9875, 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
MS21251-B3S
NSN: 5340-00-067-9875
FSC: 5340
CAGE: 0H380 — ACHILLES AEROSPACE PRODUCTS INCORPORATED (USA)
SPECIFICATIONS
materialCOPPER ALLOY 482 OVERALL
body_styleROUND BODY W/LOCKING DEVICE
body_length2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
thread_class3B BODY
thread_length2.250 INCHES NOMINAL OVERALL IN
thread_directionRIGHT-HAND OVERALL
nominal_thread_size0.190 INCHES BODY IN
end_item_identificationARMORED MULTI-PURPOSE VEHICLE (AMPV)
thread_series_designatorUNF BODY
material_document_and_classificationQQ-B-637,COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-00-067-9875
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS21251-B3S 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: COPPER ALLOY 482 OVERALL
THREAD LENGTH: 2.250 INCHES NOMINAL OVERALL IN
THREAD DIRECTION: RIGHT-HAND OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-637,COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY STYLE: ROUND BODY W/LOCKING DEVICE
BODY LENGTH: 2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
THREAD CLASS: 3B BODY
THREAD SERIES DESIGNATOR: UNF BODY
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY 482 OVERALL
THREAD LENGTH2.250 INCHES NOMINAL OVERALL IN
THREAD DIRECTIONRIGHT-HAND OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-637,COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY STYLEROUND BODY W/LOCKING DEVICE
BODY LENGTH2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
THREAD CLASS3B BODY
THREAD SERIES DESIGNATORUNF BODY
NOMINAL THREAD SIZE0.190 INCHES BODY IN
END ITEM IDENTIFICATIONARMORED MULTI-PURPOSE VEHICLE (AMPV)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MS21254-5RSUpgraded Successor
successor cross-reference
successor
MIL-DTL-8878Upgraded Successor
successor cross-reference
successor
2810695Upgraded Successor
successor cross-reference
successor
21251-B3LUpgraded Successor
successor cross-reference
successor
MS21251-B2SUpgraded Successor
successor cross-reference
successor
AN155B8LUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS21251-B3S?
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 MS21251-B3S?
MS21251-B3S is a TURNBUCKLE BODY.
What parts can replace MS21251-B3S?
There are 19 known substitutes for MS21251-B3S: MS21254-5RS, MIL-DTL-8878, 2810695 and 16 more. Substitute compatibility should be verified for your specific system.
Is MS21251-B3S still available?
MS21251-B3S is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS21251-B3S