The Aviation Point
The Aviation PointTechnical data sheet · theaviationpoint.com/parts/structural-bolts/nas1578/

NAS1578 — flat pan head, offset cruciform recess

Bolt, Flat Pan Head, Offset Cruciform Recess: thread, grip, length and commonly stocked part numbers. Head and shank dimensions come from the standard itself.

View PDF

NAS1578 at a glance

Where to buy
NAS1578, bolt, flat pan head, offset cruciform recess
NAS1578
NAS1578 engineering drawing with dimensions
Engineering drawing · dimensions in inches

Specification

ItemValue
TypeFlat pan head bolt
MaterialA: alloy steel; C: A-286 corrosion-resistant steel
StatusCheck the current issue before design use.

Part numbers

Part numbers commonly stocked, with grip and length. The standard governs and may list others.

Dia. 322 part numbers

Part no.Grip, inLength, in
NAS1578A3T2.125.487
NAS1578C3T2.125.487
NAS1578A3T3.187.549
NAS1578C3T3.187.549
NAS1578A3T4.250.613
NAS1578C3T4.250.613
NAS1578A3T5.312.675
NAS1578C3T5.312.675
NAS1578A3T6.375.738
NAS1578C3T6.375.738
NAS1578A3T7.438.801
NAS1578C3T7.438.801
NAS1578A3T8.500.863
NAS1578C3T8.500.863
NAS1578A3T9.562.925
NAS1578C3T9.562.925
NAS1578A3T10.625.988
NAS1578C3T10.625.988
NAS1578A3T11.6881.051
NAS1578C3T11.6881.051
NAS1578A3T12.7501.113
NAS1578C3T12.7501.113

Part number

What each code means

PartMeaning
AMaterial: Alloy steel
CMaterial: A-286 corrosion-resistant steel
PMaterial: Suffix P: cadmium plating, Type II Class 2
ExampleNAS1578A3T2 — Flat pan head bolt, grip .125, length .487

Notes from the standard

  • Grip tolerance ±.010.
  • Offset cruciform recess per MS14191.
  • The P listing code is plating, not a different bolt.
  • Part number format as commonly written; check the standard for the exact format.
  • Approved data governs. Use the bolt the SRM, drawing or IPC calls for.

Where to buy

AmericaDistributor coming soonOur partner for this region is on its way
EuropeDistributor coming soonOur partner for this region is on its way
OceaniaDistributor coming soonOur partner for this region is on its way

Distributors coming soon.

Keep going

Calculators

CalculatorBolt Grip Length & Washer CalculatorCheck a bolt's grip length against the parts it holds and the washers needed to make it up…CalculatorAN Bolt Hole Drill SizeDrill for an AN bolt holeCalculatorTorque by Part Number: Bolt and NutTorque for an AN or NAS bolt with its nut, from AC 43.13-1B Table 7-1CalculatorPart number cross-referenceType any NAS1578 number and see its other names.

Guides

ChartAN Bolt & Nut Torque ChartRecommended torque for AN and MS nuts and bolts in inch-pounds, fine and coarse thread, plus…ChartFastener cross-referenceFrequent fastener crosses with their supersession status

How to do it

Standard practiceTorquingHow to torque aircraft bolts

Data sheets

Data sheetAN bolts, AN3 to AN8AN3 to AN8 aircraft bolts side by sideData sheetStructural boltsThe family side by side.Data sheetNAS1297Bolt, Shoulder, Hexagon HeadData sheetNAS1580Bolt, 100° Flush Head, Offset Cruciform Recess

Buy

Distributors coming soon.

Sources

  • NAS1578 — Bolt, Flat Pan Head, Offset Cruciform Recess — nominal sizes and part numbers.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.
esc
↑↓ navigate↵ openesc close