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NAS1790V4R16A

Close Tolerance Bolt

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Description

Fastener Length: 1-7/16", Thread: 1/4-28, Thread Length: 27/64

Specifications

Countersink Angle Between 99.0 degrees and 101.0 degrees
Fastener Length Between 1.410 inches and 1.440 inches
Grip Diameter Between 0.2490 inches and 0.2495 inches
Grip Length Between 0.990 inches and 1.010 inches
Head Diameter Between 0.464 inches and 0.506 inches
Head Style Flat countersunk
Internal Drive Style Offset cruciform (torque set)
Length 1 7/16
Material Titanium
Material Specification Ams 4928 assn standard single material response or ams 4967 assn standard single material response
Min. Tensile Strength (psi) 160000 pounds per square inch
Specification Data 80205-nas1790 professional/industrial association standard
Surface Finish 32.0 microinches bearing surface of head32.0 microinches grip32.0 microinches threads
Surface Treatment Aluminum
Surface Treatment Specification Nas 4006 assn standard single treatment response
Thread Class 3a
Thread Diameter 0.250
Thread Direction Right-hand
Thread Length 0.425
Thread Qty 28
Thread Qty Per Inch (tpi) 28
Thread Series UNJF
Thread Series Designator Unjf (fine thread with external controlled root radius)
Thread Size 1/4

Other sizes

Parts that share this base number, ordered by size. Always verify the full specification before substituting.

Cross-reference

Similar parts

Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.

  • NAS1580A4R16 NAS 1/4-28 · 0.073 in · Flat countersunk · Steel
  • NAS1580C4R16 NAS 1/4-28 · 0.073 in · Flat countersunk · Iron
  • NAS1580V4R16 NAS 1/4-28 · 0.073 in · Flat countersunk · Titanium

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Catalog data updated 2026-07-05. Report a data error