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A51L21085-23 — CLAMP,BLOCK,SECTION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A51L21085-23: CLAMP,BLOCK,SECTION.

The CLAMP,BLOCK,SECTION is a the manufacturer industrial component. Key specifications include material: PLASTIC, block_height: 0.315 INCHES NOMINAL0.315 INCHES NOMINAL IN, overall_width: 0.380 INCHES NOMINAL0.380 INCHES NOMINAL IN, overall_length: 3.250 INCHES NOMINAL3.250 INCHES NOMINAL IN, style_designator: RECTANGULAR, mounting_facility: UNTHREADED HOLE(S)UNTHREADED HOLE(S). This part is cataloged in the U.S.

Government catalog under NSN 5340-01-043-0197, 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
A51L21085-23
NSN: 5340-01-043-0197
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialPLASTIC
block_height0.315 INCHES NOMINAL0.315 INCHES NOMINAL IN
overall_width0.380 INCHES NOMINAL0.380 INCHES NOMINAL IN
overall_length3.250 INCHES NOMINAL3.250 INCHES NOMINAL IN
style_designatorRECTANGULAR
mounting_facilityUNTHREADED HOLE(S)UNTHREADED HOLE(S)
clamping_hole_diameter0.190 INCHES NOMINAL SECOND HOLE IN
clamping_hole_quantity22
mounting_hole_diameter0.190 INCHES MINIMUM AND 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM0.196 INCHES MAXIMUM IN
mounting_hole_quantity22
distance_from_end_to_first_clamping_hole_center0.562 INCHES NOMINAL IN
distance_from_end_to_first_mounting_hole_center0.250 INCHES NOMINAL IN
NSN5340-01-043-0197
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51L21085-23 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
•
MOUNTING HOLE QUANTITY: 22
•
CLAMPING HOLE QUANTITY: 22
•
DISTANCE FROM END TO FIRST CLAMPING HOLE CENTER: 0.562 INCHES NOMINAL IN
•
BLOCK HEIGHT: 0.315 INCHES NOMINAL0.315 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RECTANGULAR
•
MOUNTING HOLE DIAMETER: 0.190 INCHES MINIMUM AND 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM0.196 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY22
CLAMPING HOLE QUANTITY22
DISTANCE FROM END TO FIRST CLAMPING HOLE CENTER0.562 INCHES NOMINAL IN
BLOCK HEIGHT0.315 INCHES NOMINAL0.315 INCHES NOMINAL IN
STYLE DESIGNATORRECTANGULAR
MOUNTING HOLE DIAMETER0.190 INCHES MINIMUM AND 0.190 INCHES MINIMUM AND 0.196 INCHES MAXIMUM0.196 INCHES MAXIMUM IN
OVERALL LENGTH3.250 INCHES NOMINAL3.250 INCHES NOMINAL IN
OVERALL WIDTH0.380 INCHES NOMINAL0.380 INCHES NOMINAL IN
CLAMPING HOLE DIAMETER0.190 INCHES NOMINAL SECOND HOLE IN
CLAMPING HOLE DIAMETER0.252 INCHES NOMINAL FIRST HOLE IN
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 3
GP105AUSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GSS11900CSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GM4104Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51L21085-23?
A51L21085-23 is a CLAMP,BLOCK,SECTION.
What parts can replace A51L21085-23?
There are 3 known substitutes for A51L21085-23: GP105AU, GSS11900C, GM4104. Substitute compatibility should be verified for your specific system.
What is the NSN for A51L21085-23?
A51L21085-23 is cataloged in the U.S. Government catalog under NSN 5340-01-043-0197. 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.