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68A690879-2019 — CLAMP,BLOCK

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

68A690879-2019: CLAMP,BLOCK.

The CLAMP,BLOCK is a the manufacturer industrial component. Key specifications include material: PLASTIC, block_height: 0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM0.255 INCHES MAXIMUM IN, overall_width: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN, overall_height: 0.758 INCHES NOMINAL0.758 INCHES NOMINAL IN, overall_length: 3.560 INCHES MINIMUM AND 3.560 INCHES MINIMUM AND 3.590 INCHES MAXIMUM3.590 INCHES MAXIMUM IN, special_features: HAS 2 SLOTTED CLAMPING HOLES ON EACH END,LG 0.313 IN.,WIDTH 0.205 IN. TO 0.211 IN.

IN. This part is cataloged in the U.S. Government catalog under NSN 5340-01-257-5231, 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
68A690879-2019
NSN: 5340-01-257-5231
FSC: 5340 — Hardware, Commercial
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialPLASTIC
block_height0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM0.255 INCHES MAXIMUM IN
overall_width0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
overall_height0.758 INCHES NOMINAL0.758 INCHES NOMINAL IN
overall_length3.560 INCHES MINIMUM AND 3.560 INCHES MINIMUM AND 3.590 INCHES MAXIMUM3.590 INCHES MAXIMUM IN
special_featuresHAS 2 SLOTTED CLAMPING HOLES ON EACH END,LG 0.313 IN.,WIDTH 0.205 IN. TO 0.211 IN. IN
style_designatorRECTANGULAR
mounting_facilityUNTHREADED HOLE(S)UNTHREADED HOLE(S)
clamping_hole_diameter0.391 INCHES MINIMUM AND 0.395 INCHES MAXIMUM FOURTH HOLE IN
clamping_hole_quantity55
mounting_hole_quantity22
material_document_and_classificationMIL-P-15035 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-257-5231
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 68A690879-2019 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: 55
•
CENTER TO CENTER DISTANCE BETWEEN FIRST AND FOURTH CLAMPING HOLES: 2.133 INCHES NOMINAL IN
•
BLOCK HEIGHT: 0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM0.255 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-15035 MIL SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY22
OVERALL HEIGHT0.758 INCHES NOMINAL0.758 INCHES NOMINAL IN
CLAMPING HOLE QUANTITY55
CENTER TO CENTER DISTANCE BETWEEN FIRST AND FOURTH CLAMPING HOLES2.133 INCHES NOMINAL IN
BLOCK HEIGHT0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM0.255 INCHES MAXIMUM IN
STYLE DESIGNATORRECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-15035 MIL SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH3.560 INCHES MINIMUM AND 3.560 INCHES MINIMUM AND 3.590 INCHES MAXIMUM3.590 INCHES MAXIMUM IN
OVERALL WIDTH0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
CLAMPING HOLE DIAMETER0.391 INCHES MINIMUM AND 0.395 INCHES MAXIMUM FOURTH HOLE IN
SUBSTITUTES & CROSS-REFERENCES 3
68A690879-2015/2017/2019Reference document
Same NSN cross-reference
Reference document — Secondary reference
68A690879-2015Reference document
Same NSN cross-reference
Reference document — Secondary reference
68A690879-2017Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 68A690879-2019?
68A690879-2019 is a CLAMP,BLOCK.
What parts can replace 68A690879-2019?
There are 3 known substitutes for 68A690879-2019: 68A690879-2015/2017/2019, 68A690879-2015, 68A690879-2017. Substitute compatibility should be verified for your specific system.
What is the NSN for 68A690879-2019?
68A690879-2019 is cataloged in the U.S. Government catalog under NSN 5340-01-257-5231. 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.