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A51L41901-13 — CLAMP,BLOCK,SECTION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A51L41901-13: CLAMP,BLOCK,SECTION.

The CLAMP,BLOCK,SECTION is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, block_height: 0.318 INCHES NOMINAL0.318 INCHES NOMINAL IN, overall_width: 0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN, overall_length: 1.375 INCHES NOMINAL1.375 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 5340-01-043-6061, 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
A51L41901-13
NSN: 5340-01-043-6061
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
block_height0.318 INCHES NOMINAL0.318 INCHES NOMINAL IN
overall_width0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN
overall_length1.375 INCHES NOMINAL1.375 INCHES NOMINAL IN
style_designatorRECTANGULAR
mounting_facilityUNTHREADED HOLE(S)UNTHREADED HOLE(S)
clamping_hole_diameter0.380 INCHES MINIMUM AND 0.384 INCHES MAXIMUM ALL HOLES IN
clamping_hole_quantity22
mounting_hole_diameter0.1690 INCHES MINIMUM AND 0.1690 INCHES MINIMUM AND 0.1740 INCHES MAXIMUM0.1740 INCHES MAXIMUM IN
mounting_hole_quantity11
material_document_and_classificationQQ-A-250/4 T851 FED SPEC SINGLE MATERIAL RESPONSE
distance_from_end_to_first_clamping_hole_center0.313 INCHES NOMINAL IN
NSN5340-01-043-6061
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51L41901-13 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: 11
•
CLAMPING HOLE QUANTITY: 22
•
DISTANCE FROM END TO FIRST CLAMPING HOLE CENTER: 0.313 INCHES NOMINAL IN
•
BLOCK HEIGHT: 0.318 INCHES NOMINAL0.318 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/4 T851 FED SPEC SINGLE MATERIAL RESPONSE
•
MOUNTING HOLE DIAMETER: 0.1690 INCHES MINIMUM AND 0.1690 INCHES MINIMUM AND 0.1740 INCHES MAXIMUM0.1740 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY11
CLAMPING HOLE QUANTITY22
DISTANCE FROM END TO FIRST CLAMPING HOLE CENTER0.313 INCHES NOMINAL IN
BLOCK HEIGHT0.318 INCHES NOMINAL0.318 INCHES NOMINAL IN
STYLE DESIGNATORRECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/4 T851 FED SPEC SINGLE MATERIAL RESPONSE
MOUNTING HOLE DIAMETER0.1690 INCHES MINIMUM AND 0.1690 INCHES MINIMUM AND 0.1740 INCHES MAXIMUM0.1740 INCHES MAXIMUM IN
OVERALL LENGTH1.375 INCHES NOMINAL1.375 INCHES NOMINAL IN
OVERALL WIDTH0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN
CLAMPING HOLE DIAMETER0.380 INCHES MINIMUM AND 0.384 INCHES MAXIMUM ALL HOLES 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51L41901-13?
A51L41901-13 is a CLAMP,BLOCK,SECTION.
What is the NSN for A51L41901-13?
A51L41901-13 is cataloged in the U.S. Government catalog under NSN 5340-01-043-6061. This indicates validated use in U.S. government and defense supply chains.
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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.